* Crankshaft Position Sensor (CKP): This is a very common cause of this type of starting problem. A failing CKP sensor provides erratic or no signal to the ECU, causing the engine to stall. The intermittent nature suggests the sensor might be failing intermittently.
* Camshaft Position Sensor (CMP): Similar to the CKP sensor, a malfunctioning CMP sensor can disrupt the engine's timing and lead to stalling.
* Fuel Pump Relay: The pump might be weak or the relay might be failing intermittently, leading to fuel starvation after a few seconds of running.
* Fuel Pump: A failing fuel pump might not provide enough pressure after it's been running for a short period, resulting in the stalling.
* Ignition System: While less likely given the restart ability, a weak ignition coil, faulty ignition module, or worn distributor cap/rotor could cause intermittent misfires and stalling.
* Mass Airflow Sensor (MAF): A dirty or faulty MAF sensor can provide incorrect air/fuel mixture readings to the ECU, potentially leading to stalling.
* ECU (Engine Control Unit): In rare cases, a failing ECU could be the culprit. This is less likely, however, as other issues are more common.
Why the check engine light is relevant: The illuminated check engine light strongly suggests a diagnostic trouble code (DTC) is stored in the ECU's memory. This code provides a vital clue to the specific problem. You absolutely must get the code(s) read using a code reader compatible with your vehicle's OBD-I system (it's likely an OBD-I system, as that was common in 1992). Auto parts stores usually offer free code reading services.
Troubleshooting Steps:
1. Read the Check Engine Light Codes: This is the single most important step. The codes will greatly narrow down the possibilities.
2. Check Fuel Pressure: If you have the tools, measuring fuel pressure can help determine if the fuel pump is the problem.
3. Inspect the CKP and CMP Sensors: Look for obvious damage, corrosion, or loose connections.
4. Check the Fuel Pump Relay: Ensure it's clicking when the ignition is turned on.
5. Inspect the Ignition System Components: Visually inspect the components for signs of wear or damage.
Without knowing the DTCs, pinpointing the exact cause is pure speculation. Getting the codes read should be your first priority. From there, you can focus your troubleshooting efforts more effectively.
